Improvement in rotary boilers for the manufacture of paper-pulp



iNrrnn STATESv za'rnNr tries.

IMPROVEMENT IN ROTARY BOILERS FOR THE MANUFACTURE OF PAPER-PULP.

Specification forming'part of Letters Patent No. dfl, dated January l0, 1865.

To all whom it may concern Be it known that I, HARRISON B. Menon, of Fort Edward, in the county of Vashington and State ot' New York, have invented a new and useful Improvement in the Construction ot' Rotary Boilers for the use ot' lvlanufacturers ot' Paper; and I do hereby declare that the following is a full and exact description of the s1me,rei'erence being had to the accompanying drawings, and to the letters of reference marl;- eil thereon.

Figure l represents a sectional view of such rotary boiler in its position in the arch over the iire and ready for use, and also the internal arrangement of diaphragms, pipes for the introduction ot' the boiling liquors, to be used in the boiling of the material, also for the introduction ot' water for washing the material in the boiler after the same has been treated by boiling, and also for discharging the liquor from the said rotary after the boiling process has been completed; also, pipes for the pass age ot' steam by which to communicate with I a steam-gage. Fig. 2 is a View ofthe position and structure et such steam-pipe communicating with the steam gage. Fig. 3 is a view ot the diaphragm with its opening at D, situated at the end ot the rotary over the furnace Gr. Fi 4 represents the diaphragm with its opening D at the opposite end ot' the rotary, and Fig. 5 represents the situation of the pipe within the rotary and between the diaphragm and the end of the rotary for the purpose ot' receiving and discharging liquors and water used within the rotary during the process of treating stock boiled therein.

The improvements which the applicant desires to secure by Letters Patent have for their object, first, an improved method of combining the pipes for the purpose of introducing water and other fluid substances into and also for discharging the same from such rotary 5 and, second, a means by which the connection of the steam-gage with the steam within the boilermay at all times be determined; and, third, the prevention of the steam-pipe from being stopped by the introduction of material being treated within it.

To enable others skilled in the art to malte and use my invention, I will proceed to describe its construction and operation.

Y Y in Fig. l represent the rotary boiler resting upon the bearings or journals ci d',

l which are hollow,for the purpose of admitting the passage of pipes a a, through them, co1n municating with the internal contents of the rotary.

F F represents the ends ot1 said rotary.

E E represent a partition perforated by numerous small openings, as represented in Figs. 3 and 4.

H represents the man-head in position over the man-hole ofthe rotary, but without its fastenings.

C and a represent the pipe entering the rotary through its hollow journal, and bending downward tor the purpose of charging with and discharging the rotary of its duid con- 4tents from near the bottom of the rotary.

A a represent the steam-pipe covered at its upper end, at B, by means of a perforated cap, B, and, passing out of the rotary through its journal a, communicates with a chamber, K, which also communica-tes with the bent tube L, connecting with a steam-gage for the purpose of determining the internal pressure within the rotary.

M represents the position of a stopcoclr for the purpose of determining the state of communication between the steam in the boiler and the steam-gage.

N O I) represent the position of stop-cocks in the pipes, for the purposes hereinafter dcscribed. v

Gr represents the iirevchamber underneath one end of the rotary.

s s s s represent the space around the rotary for the circulation ot' the a-meheated gases and air about the rotary for the purpose of heating the same.

R R represent the upper portion of the arch surrounding the rotary, and S S the bed ofthe same.

d represents the fire-bridge, and t tthe back of the hre-chamber through which the rotary passes.

X represents the smoke-flue.

The pipes b c d', connecting with the pipe a, and through it"communicating with the internal portions ofthe rotary, are each capable of being closed by stop-cocks situated in the respective pipes, stop-cock P in the pipe b', stop-cock 0 in the pipe d', and stop-cock N in the pipe c.

The operation is as follows: By closing the stopcocks P and 0 and opening the stop-cock.

Nin the pipe c', connecting with the pau containing the boiling liquor, the liquor is run into the rotary in suflicient quantity, when the stop-cock N is closed. After the boiling is completed the stop-cock P in the pipe b is opened and the liquor is discharged from the rotary. On closing the stop coclr P and open ing the stopcock O in the pipe d Water is conducted into the rotary for the purpose ot' Washing the stock therein. The diaphragm E separates the stock Within the rotary and prevents it from coming in contact with the pipe c, s0 that the space between said diaphragm and the end ofthe rotary contains only the liquid.

The steam-pipe A c, passing through the journal a and entering the chamber K so far as the same is within the rotary, is situated between the diaphragm E and the end of the rotary F, and is directed upward that it may rise above the liquid contents of the rotary within the same and be separated from the material being treated in the rotary. The upper end ot' such pipe is covered With a perforated cap, B, to prevent the possible entry of any material into the steam-pipe which might escape through the diaphragm. The steam-chamber K is connected with the steam Within the rotary by means of the steam-pipe A a a, and with the steam-gage by means of' the steam-pipe L, and with the stop cock M by means of the pipe g. The value of this arran gementconsists in being able to determine, by turning the stop-cock M, Whether there is free communication between the steam Within the rotary and thc steam-ga ge connected With the bent pipe L.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

l. The combination ot' the pipes b', c', and d' with their opera-tive stopcocks I?, N, and 0, with the pipe a C, entering into the rotary Y Y in the manner and tor the purposes above described.

2. The perforated capB, in combination with the steam-pipe A a a, passing out otl the rotary through its journal a. in the manner and for the purpose above described.

3. The combination ot' the pipe A a. cc, the steam-chamber K, the pipe g, and the stopcock M in the manner and for the purpose above described.

HARRISON B. MEEGH.

Witnesses:

EDWARD WADE, JOEL TIFFANY.- 

